A NIMAL A program of the Natural Resource Information System, Montana State Library OF CONCERN JULY 2004

INTRODUCTION This report is produced on an annual basis jointly by the Montana Natural Heritage Program (MTNHP) and Montana Fish Wildlife and Parks (MFWP). Montana Species of Concern are native breeding in the state that are considered to be “at risk” due to declining population trends, threats to their , and/or Coeur d’Alene Salamander restricted distribution. (Plethodon idahoensis) Illustration by John Carlson Also included in this report are Potential Species of Concern -- animals for which current, often limited, information suggests potential vulnerability or for which HERITAGE PROGRAM RANKS additional data are needed before an accurate status assessment can be made. Many of these species have The international network of Natural Heritage Programs ranks reflecting the uncertainty of their status, and we employs a standardized ranking system to denote global hope that highlighting them as Potential Species of and state status. Each species is given a global (G) rank, Concern will encourage biologists to conduct surveys and denoting rangewide status, and a state (S) rank for its submit new data. The category “Species on Review” status in Montana. Status ranks range from 1 (greatest included in the 2003 report has been merged into Potential concern) to 5 (least concern). Global ranks are assigned by Species of Concern. scientists at NatureServe (the international affiliate organi- Status determinations are made by MTNHP and zation for the heritage network) in consultation with MFWP biologists in consultation with representatives of biologists in the natural heritage programs and other the Montana Chapter of the Wildlife Society, the Montana taxonomic experts. State ranks are determined jointly by Chapter of the American Fisheries Society and other MTNHP and MFWP biologists, in consultation with other experts. The process for evaluating and assigning status state experts. designations uses the Natural Heritage Program ranking The combination of global and state ranks helps system, described below, which forms the basis for describe the proportion of a species’ range and/or total identifying Montana Species of Concern. population occurring in Montana. For instance, a rank of This report identifies 119 vertebrate and 58 inverte- G3 S3 indicates that Montana comprises most or a very brate Species of Concern. Another 37 vertebrates and 50 significant portion of an ’s total population. In invertebrates are identified as Potential Species of contrast, an animal ranked G5 S1 often occurs in Montana Concern. See the “Box Scores” below for totals by animal at the periphery of its much larger range; thus, the state group. Thirteen species included in the 2003 report have supports a relatively small portion of its total population. been dropped from consideration (see page 11).

BOX SCORES Species of Concern Potential Species of Concern Amphibians ...... 5 Amphibians ...... 0 Birds ...... 60 Birds ...... 18 Fish ...... 18 Fish ...... 10 Mammals ...... 27 Mammals ...... 9 Reptiles ...... 9 Reptiles ...... 0 Invertebrates - ...... 29 Invertebrates - Insects ...... 48 Invertebrates - Mollusks ...... 22 Invertebrates - Mollusks ...... 2 Invertebrates - Other ...... 7 Invertebrates - Other ...... 0

© 2004 Montana Natural Heritage Program 1 What’s on the Lists has not yet been applied to invertebrates, so the ranks Montana Species of Concern are defined as vertebrate presented in this report reflect the traditional ranking animals with a state rank of S1, S2, or S3. Vertebrate approach. species with a rank indicating uncertainty (SU) or a “range rank” extending below the S3 cutoff (e.g., S3S4) are Definitions of Ranks used in this Report considered Potential Species of Concern. Because documentation for invertebrates is typically G1 / S1 At high risk because of extremely limited and/or far less than for vertebrates, only those ranked S1 or S2 are rapidly declining numbers, range, and/or , included as Species of Concern. Invertebrates ranked S3 making it highly vulnerable to global extinction or are included only if they are also considered globally extirpation in the state. vulnerable (G3 or higher) or if experts agree their occurrence in Montana has been adequately documented. G2 / S2 At risk because of very limited and/or declining All other invertebrates ranked S3 are treated as Potential numbers, range, and/or habitat, making it Species of Concern. Also included as Potential Species of vulnerable to global extinction or extirpation in the Concern are globally common (G4 or G5) invertebrates with state. a range rank extending below the S2 cutoff cited above (e.g., S2S4). Invertebrates ranked as SU have been G3 / S3 Potentially at risk because of limited and/or dropped from Potential Concern. declining numbers, range, and/or habitat, even though it may be abundant in some areas. How Species are Ranked This year, we began implementing a more rigorous G4 / S4 Uncommon but not rare (although it may be rare in methodology with more consistent and quantifiable criteria parts of its range), and usually widespread. to assign status ranks. The goal is to improve the accuracy Apparently not vulnerable in most of its range, but of ranks and better document the basis for each rank. possibly cause for long-term concern. Having a rigorous and well-documented ranking procedure is especially important to MFWP, which is using status G5 / S5 Common, widespread, and abundant (although it ranks to help set priorities for the state’s Comprehensive may be rare in parts of its range). Not vulnerable in Fish and Wildlife Plan. most of its range. This new approach to assessing species’ status is based on methods developed by NatureServe (Master et al. GU / SU Currently unrankable due to lack of information or 2003). In December 2003, a group of staff and other experts due to substantially conflicting information about met to review the proposed process, tested it on a variety status or trends. of taxa, and endorsed its use in the 2004 status review. Staff then contacted Montana experts for each animal GH / SH Historically occurred; may be rediscovered. group and asked them to rank species according to six separate criteria. These criteria included population size, GX / SX Believed to be extinct; historical records only. area of occupancy in Montana, short and long-term trends, threats, inherent vulnerability, and specificity to Other codes and rank modifiers: environment. Based on this expert input, a preliminary rank B / N State rank modifiers indicating the breeding status was calculated, which then was reviewed with key experts. for a migratory species; B = Breeding, N = Non- It is important to note that while the ranking process breeding. has changed, the definitions and the fundamental criteria remain the same. The principle difference is that criteria are HYB A global rank denoting a . now being applied in a more rigorous and consistent manner. Detailed documentation of the criteria and M A state rank modifier indicating migratory assessment process are available on the MTNHP website stopover status for a species. at mtnhp.org/animals/index.html. This status assessment process was completed for all Q A global rank modifier indicating that there are of Montana’s amphibian, reptile and mammal species. Due taxonomic questions or problems. to the large number of bird species in the state, only those already on the 2003 Species of Concern list were evaluated T Denotes the rank for a subspecific taxon to date; the remaining bird species will be assessed in (subspecies or population); appended to the future revisions. Updated ranks for fish are not included in global rank for the full species. The S Rank this report, to allow the Montana Chapter of the American following applies to the subspecific taxon. Fisheries Society additional time for review; they will be reported in the 2005 update. The new ranking methodology ? Denotes inexactness or uncertainty.

© 2004 Montana Natural Heritage Program 2 HOW TO READ THE LISTS ADDITIONAL INFORMATION

Species are listed alphabetically by common name Our internet-based Field Guide to Montana’s Animals, within major groups, which are organized alphabetically completed in 2003, provides information on over 600 under Vertebrates and Invertebrates. Species with names vertebrate species, including Species of Concern and bolded and underlined are new additions to the Species of Potential Species of Concern. The Field Guide offers a broad Concern or Potential Species of Concern list. (Those range of information, including species identification, range, downgraded from Concern to Potential Concern are not habitat, reproduction, food habits, ecology, management, shown as new.) Where the global or state rank was and references. For many Species of Concern, the Field changed, that rank is bolded and underlined. Guide provides extensive detailed information from the Current federal agency status designations are also databases of MTNHP. Photos and call recordings are provided, including legal status under the U.S. provided where available. Endangered Species Act, and administrative designations The Field Guide can be accessed through the Natural of the U.S. Forest Service and Bureau of Land Heritage Program web page at mtnhp.org and the Montana Management. Where the ESA listing status has changed Fish, Wildlife and Parks web page at www.fwp.state.mt.us. since 2003, the new status is bolded and underlined. The MTNHP website also offers the Montana Bird Distribution Database, where anyone can enter – and Federal Status Designations access – statewide bird observation data. FISH AND WILDLIFE SERVICE The NatureServe Explorer website provides information This column indicates status under the federal Endangered on the status of species throughout North America. It can Species Act of 1973 based on categories defined by the be found at www.natureserve.org/explorer or from a link on U.S. Fish and Wildlife Service (16 U.S.C.A. §1531-1543 the MTNHP website. This application includes status maps (Supp. 1996)). showing the state/provincial ranks across each species’ range, assembled from the network of natural heritage E Listed Endangered programs. (Note that updated ranks for Montana animals T Listed Threatened will not be immediately reflected in NatureServe Explorer.) PE Proposed Endangered More detailed data on the occurrence of Montana PT Proposed Threatened Species of Concern are available on request from MTNHP, XN Experimental Nonessential using the “Get Data” function on the website or through the C Candidate (species for which the U.S. Fish and contact information provided there. Wildlife Service has sufficient information on This report is available in electronic format on the biological status and threats to propose listing as MTNHP website under “Reports.” Hard copies are threatened or endangered) available on request from MTNHP (see box below) or from MFWP at (406) 444-2535. FOREST SERVICE The U.S. Forest Service Manual (2670.22) defines the Comments and Feedback status of Sensitive species on Forest Service lands. The We welcome comments and suggestions, including Regional Forester (Northern Region) designates Sensitive recommendations for additions or insights into species’ species on National Forests in Montana. This designation status, as well as new observation data. All comments and applies only on USFS-administered lands. information should be directed to MTNHP at [email protected] or the address below. Please submit S Sensitive; animal species identified by the observations using forms available on the MTNHP website Regional Forester for which population viability is (select “Animals” then “Submit Data”). a concern as evidenced by significant downward trend in population or a significant downward trend in habitat capacity.

BUREAU OF LAND MANAGEMENT Montana Natural Heritage Program The BLM 6840 Manual defines the status of species on P.O. Box 201800 Bureau of Land Management lands. The Montana State 1515 East Sixth Avenue Office of the BLM assigns these designations in 1996. Helena, MT 59620-1800 They apply only on BLM-administered lands. (406) 444-5354 Fax (406) 444-0581 mtnhp.org S Sensitive; species that are proven imperiled in at [email protected] least part of their ranges and are documented to occur on BLM lands.

© 2004 Montana Natural Heritage Program 3 SELECTED REFERENCES

Brown, C. J. D. 1971. Fishes of Montana. Montana State University, Bozeman. 207 pp. Miller, K. B. and D. L. Gustafson. 1996. Distribution of the of Montana. Bulletin of American Carlson, J.C. 2001. Montana Animal Species of Concern. Odonatology 3(4):75-88. Montana Natural Heritage Program and Montana Fish, Wildlife and Parks, Helena, Montana. Montana Bird Distribution Committee. 1996. P. D. Skaar’s Montana bird distribution. Fifth edition. Special Carlson, J.C. 2003. Montana Animal Species of Concern. Publication No. 3, Montana Natural Heritage Program, Montana Natural Heritage Program and Montana Helena. 129 pp. Fish, Wildlife and Parks, Helen, Montana. Roedel, M. D. 1999. Montana animal species of special Flath, D. L. 1984. Vertebrate species of special interest or concern. Montana Natural Heritage Program, Helena. concern. Montana Department of Fish, Wildlife and 8 pp. Parks. Helena. 76 pp. Reichel, J. D. and D. Flath. 1995. Identification of Flath, D. L. 1998. Species of special interest or concern. Montana’s amphibians and reptiles. Montana Montana Department of Fish, Wildlife and Parks, Outdoors 26(3):15-34. Helena, Montana. 7 pp. Thompson, L. S. 1982. Distribution of Montana amphibians, Frest, T. J. and E. J. Johannes. 1995. Interior Columbia reptiles, and mammals. Montana Audubon Council, Basin mollusk species of special concern. Final Helena. 24 pp. report to the Interior Columbia Basin Ecosystem Management Project, Walla Walla, WA. 274 pp. plus Wang, D., and J. R. Holsinger. 2001. Systematics of the appendices. subterranean amphipod Stygobromus (Crangonyctidae) in western North America, with Foresman, K.R. 2001. The Wild Mammals of Montana. emphasis on the hubbsi group. Amphipacifica 3:39- Special Publication No. 12. The American Society of 147. Mammalogists. Lawrence, KS. 278 pp. Wright, P. L. 1996. Status of Rare Birds in Montana with Holton, G. D., and H. E. Johnson. 1996. A field guide to Comments on Known Hybrids. Northwest Naturalist Montana fishes. Second Edition. Mont. Dept. Fish, 77(3):57-85. Wildl. Parks, Helena. 104 pp.

Lenard, S., J. Carlson, J. Ellis, C. Jones, and C. Tilly. 2003. The preferred citation for this document is: P.D. Skaar’s Montana bird distribution, Sixth edition. Montana Audubon, Helena, MT. 144 pp. Montana Natural Heritage Program. 2004. Montana Animal Species of Concern. MTNHP & MFWP. Lewis, J. J. 2001. Three new species of subterranean Helena, Montana. 11pp. assellids from western North America, with a synopsis of the species of the region (Crustacea: Isopoda: Asellidae). Texas Memorial Museum, ACKNOWLEDGEMENTS Speleological Monograpsh 5:1-15. A team of MTNHP and MFWP staff coordinated the Masters, L.L., L.E. Morse, A.S. Weakley, G.A. Hammerson rank review process and production of this report; they and D. Faber-Langendoen. 2003. NatureServe include Steve Carson, Sue Crispin, Coburn Currier, Paul Conservation Status Assessment Criteria. Hendricks, Janet Hess-Herbert, Andrew Jakes, Susan Lenard, NatureServe, Arlington, VA, USA. Adam Messer, T.O. Smith and Leni Wilsmann. Thanks also to John Carlson who, as former Zoology Program Manager Maxell, B. A., J. K. Werner, P. Hendricks, and D. L. Flath. for MTNHP, got the ball rolling and proposed the ranking 2003. Herpetology in Montana: a history, status methodology now in use. summary, checklists, dichotomous keys, accounts for We would also like to recognize and extend special native, potentially native, and exotic species, and thanks to the many, many biologists who have provided data indexed bibliography. Northwest Fauna Number 5. and information, conducted status evaluations and reviewed 138 pp. species ranks throughout this process.

© 2004 Montana Natural Heritage Program 4 SPECIES OF CONCERN Global State Common Name Scientific Name Rank Rank USFWS USFS BLM Amphibians Boreal Toad Bufo boreas boreas G4T4 S2 Coeur d’Alene Salamander Plethodon idahoensis G4 S2 S S Great Plains Toad Bufo cognatus G5 S2 Northern Leopard Frog Rana pipiens (E. of cont. divide) G5 S3 S Northern Leopard Frog Rana pipiens (W. of cont. divide) G5 S1 S Plains Spadefoot Spea bombifrons G5 S3 Birds Alder Flycatcher Empidonax alnorum G5 S1B American White Pelican Pelecanus erythrorhynchos G3 S3B Baird’s Sparrow Ammodramus bairdii G4 S2B SS Bald Eagle Haliaeetus leucocephalus G4 S3B,S3N T Barn Owl Tyto alba G5 S1B,S1N Black Rosy-Finch Leucosticte atrata G4 S2 Black Swift Cypseloides niger G4 S3B Black Tern Chlidonias niger G4 S3B S Black-and-white Warbler Mniotilta varia G5 S2S3B Black-backed Woodpecker Picoides arcticus G5 S2 SS Black-crowned Night-heron Nycticorax nycticorax G5 S3B Blue-gray Gnatcatcher Polioptila caerulea G5 S1B Bobolink Dolichonyx oryzivorus G5 S2B Boreal Chickadee Poecile hudsonica G5 S1S2 Brewer’s Sparrow Spizella breweri G5 S2B Broad-tailed Hummingbird Selasphorus platycercus G5 S1B Burrowing Owl Athene cunicularia G4 S2B SS Caspian Tern Sterna caspia G5 S2B Cassin’s Kingbird Tyrannus vociferans G5 S2B Chestnut-collared Longspur Calcarius ornatus G5 S3B Columbian Sharp-tailed Grouse Tympanuchus phasianellus columbianus G4T3 S1 S S Common Loon Gavia immer G5 S2B S S Common Tern Sterna hirundo G5 S3B Dickcissel Spiza americana G5 S1S2B S Eastern Bluebird Sialia sialis G5 S2B Ferruginous Hawk Buteo regalis G4 S2B S Flammulated Owl Otus flammeolus G4 S3B S S Forster’s Tern Sterna forsteri G5 S2B Franklin’s Gull Larus pipixcan G4G5 S3B Grasshopper Sparrow Ammodramus savannarum G5 S3B Gray-crowned Rosy-Finch Leucosticte tephrocotis G5 S2B, S5N Great Gray Owl Strix nebulosa G5 S3 S Greater Sage-Grouse Centrocercus urophasianus G4 S3 SS Harlequin Duck Histrionicus histrionicus G4 S2B S S Interior Least Tern Sterna antillarum athalassos G4T2Q S1B E Lark Bunting Calamospiza melanocorys G5 S3B Le Conte’s Sparrow Ammodramus leconteii G4 S1S2B S Lewis’s Woodpecker Melanerpes lewis G4 S2B Loggerhead Shrike Lanius ludovicianus G4 S3B SS Long-billed Curlew Numenius americanus G5 S2B S McCown’s Longspur Calcarius mccownii G5 S2B Mountain Plover Charadrius montanus G2 S2B

© 2004 Montana Natural Heritage Program 5 Global State Common Name Scientific Name Rank Rank USFWS USFS BLM Birds (con’t) Nelson’s Sharp-tailed Sparrow Ammodramus nelsoni G5 S1B Northern Goshawk Accipiter gentilis G5 S3 SS Northern Hawk Owl Surnia ulula G5 S1B,S1N Olive-sided Flycatcher Contopus cooperi G4 S3B Peregrine Falcon Falco peregrinus G4 S2B S S Piping Plover Charadrius melodus G3 S2B T Red-headed Woodpecker Melanerpes erythrocephalus G5 S3B Sage Sparrow Amphispiza belli G5 S1S3B S Sage Thrasher Oreoscoptes montanus G5 S3B Sedge Wren Cistothorus platensis G5 S1B Sprague’s Pipit Anthus spragueii G4 S2B S Swainson’s Hawk Buteo swainsoni G5 S3B S Trumpeter Swan Cygnus buccinator G4 S2B,S2N S S White-faced Ibis Plegadis chihi G5 S1B S White-tailed Ptarmigan Lagopus leucurus G5 S3 Whooping Crane Grus americana G1 S1M E Yellow Rail Coturnicops noveboracensis G4 S1B Yellow-billed Cuckoo Coccyzus americanus (E. pop.) G5 S3B Yellow-billed Cuckoo Coccyzus americanus (W. pop.) G5 S1S2B C Fish Blue Sucker Cycleptus elongatus G3G4 S2S3 S Bull Trout Salvelinus confluentus G3 S2 T S Columbia River Redband Trout Oncorhynchus mykiss gairdneri G5T4 S1 S Fluvial Arctic Grayling Thymallus arcticus montanus G5T1Q S1 C S Northern Redbelly X Finescale Dace Phoxinus eos x phoxinus neogaeus HYB S3 S Paddlefish Polyodon spathula G4 S1S2 S Pallid Sturgeon Scaphirhynchus albus G1 S1 E Pearl Dace Margariscus margarita G5 S2 S Sauger Stizostedion canadense G5 S2 Shortnose Gar Lepisosteus platostomus G5 S1 S Sicklefin Chub Macrohybopsis meeki G3 S1 S S Spoonhead Sculpin Cottus ricei G5 S3 Sturgeon Chub Macrohybopsis gelida G3 S2 S Torrent Sculpin Cottus rhotheus G5 S3 S Trout-perch Percopsis omiscomaycus G5 S2 Westslope Cutthroat Trout Oncorhynchus clarki lewisi G4T3 S2 S S White Sturgeon Acipenser transmontanus G4T1Q S1 E S (Kootenai River Population) Yellowstone Cutthroat Trout Oncorhynchus clarki bouvieri G4T2 S2 S S Mammals American Bison Bos bison G4 S2 (free ranging herds) Arctic Shrew Sorex arcticus G5 S1S3 Black-footed Ferret Mustela nigripes G1 S1 E, XN Black-tailed Jack Rabbit Lepus californicus G5 S2 Black-tailed Prairie Dog Cynomys ludovicianus G4 S3 CSS Canada Lynx Lynx canadensis G5 S3 T Dwarf Shrew Sorex nanus G4 S2S3 Eastern Red Bat Lasiurus borealis G5 S2S3 Fisher Martes pennanti G5 S3 S S

© 2004 Montana Natural Heritage Program 6 Global State Common Name Scientific Name Rank Rank USFWS USFS BLM Mammals (con’t) Fringed Myotis Myotis thysanodes G4G5 S3 Gray Wolf Canis lupus G4 S3 T, XN Grizzly Bear Ursus arctos horribilis G4T3T4 S2S3 T Great Basin Pocket Mouse Perognathus parvus G5 S2S3 Hispid Pocket Mouse Chaetodipus hispidus G5 S1S3 Meadow Jumping Mouse Zapus hudsonius G5 S2 S Merriam’s Shrew Sorex merriami G5 S3 S North American Wolverine Gulo gulo luscus G4T4 S3 S S Northern Bog Lemming Synaptomys borealis G4 S2 S S Northern Myotis Myotis septentrionalis G4 S2S3 Pallid Bat Antrozous pallidus G5 S2 Preble’s Shrew Sorex preblei G4 S3 S Pygmy Rabbit Brachylagus idahoensis G4 S3 S S Spotted Bat Euderma maculatum G4 S2 Swift Fox Vulpes velox G3 S3 S S Townsend’s Big-eared Bat Corynorhinus townsendii G4 S2 SS Uinta Chipmunk Tamias umbrinus G5 S3 White-tailed Prairie Dog Cynomys leucurus G4 S1 S S Reptiles Greater Short-horned Lizard Phrynosoma hernandesi G5 S3 Milk Snake Lampropeltis triangulum G5 S2 Northern Alligator Lizard Elgaria coerulea G5 S3 Sagebrush Lizard Sceloporus graciosus G5 S3 Smooth Green Snake Liochlorophis vernalis G5 S2 Snapping Turtle Chelydra serpentina G5 S3 S Spiny Softshell Apalone spinifera G5 S3 S Western Hognose Snake Heterodon nasicus G5 S2 Western Skink Eumeces skiltonianus G5 S3 Invertebrates - Insects Beetles Brown’s Microcylloepus Riffle Beetle Microcylloepus browni G1 S1 Warm Spring Zaitzevian Riffle Beetle Zaitzevia thermae G1 S1 C Fritillary Boloria alberta G3 S2S3 Frigga’s Fritillary Boloria frigga G5 S1S2 Gillette’s Checkerspot Euphydryas gillettii G2G3 S2 Gray Comma Polygonia progne G5 S2 Magdalena Alpine Erebia magdalena G5 S2 Ottoe Skipper Hesperia ottoe G3G4 S2S3 S Caddisflies A Caddisfly Rhyacophila ebria G1? S1? A Rhyacophilan Caddisfly Rhyacophila newelli G2? S2? A Rhyacophilan Caddisfly Rhyacophila glacieri G1 S1 Alexander’s Rhyacophilan Caddisfly Rhyacophila alexanderi G2 S2 An Agapetus Caddisfly Agapetus montanus G2? S2? Last Best Place optimolocus G1G3Q S1S3 Subarctic Bluet interrogatum G5 S1S2 Boreal Whiteface Leucorrhinia borealis G5 S1

© 2004 Montana Natural Heritage Program 7 Global State Common Name Scientific Name Rank Rank USFWS USFS BLM Invertebrates - Insects (con’t) Dragonflies (con’t) Brush-tipped Emerald walshii G5 S1S2 Eastern Ringtail Erpetogomphus designatus G5 S1 Subarctic Darner subarctica G5 S1S2 Western Pondhawk Erythemis collocata G5 S1S2 Mayflies A Mayfly Caenis youngi G4 S2 Springtails A Springtail Oncopodura cruciata G1G2 S1S2 Stoneflies A Stonefly Isocapnia crinita G4 S2 A Stonefly Isocapnia integra G4 S2 A Stonefly Utacapnia columbiana G4 S2 A Stonefly Zapada cordillera G3 S2 A Stonefly Isoperla petersoni G5 S2 Meltwater Lednian Stonefly Lednia tumana G1 S1 Western Glacier Stonefly Zapada glacier G2 S1 Invertebrates - Mollusks Alpine Mountainsnail Oreohelix alpina G1 S1 Berry’s Mountainsnail Oreohelix strigosa berryi G5T2 S1S2 Bitterroot Mountainsnail Oreohelix amariradix G1G2 S1S2 Carinate Mountainsnail Oreohelix elrodi G1 S1 Fir Pinwheel Radiodiscus abietum G3 S2S3 Flathead Pondsnail Stagnicola elrodi G1 S1 Gallatin Mountainsnail Oreohelix yavapai mariae G4T1Q S1 Humped Coin Polygyrella polygyrella G2G3 S1S3 Keeled Mountainsnail Oreohelix carinifera G1 S1 Large-mantle Physa Physa megalochlamys G3 S1 Largemouth Pondsnail Stagnicola elrodiana G1 S1 Lyre Mantleslug Udosarx lyrata lyrata G2T2 S1 Marbled Jumping-slug Hemphillia danielsi G1G3 S1S3 Mission Range Disc Discus brunsoni G1 S1 Mountain Marshsnail Stagnicola montanensis G3 S1S3 Rocky Mountain Capshell Acroloxus coloradensis G1G2 S1 Rocky Mountain Duskysnail Colligyrus greggi G3G4 S1 Russell Mantleslug Udosarx lyrata russelli G2T1 S1 Sheathed Slug Zacoleus idahoensis G3G4 S2S3 Shortface Lanx Fisherola nuttalli G2 S1S3 Spotted Slug Magnipelta mycophaga G2G3 S1S3 Striate Disc Discus shimekii G5 S1 Invertebrates - Other Arachnids A cave obligate Harvestman Cryptobunus cavicolus G1G2 S1S2 Crustaceans A cave obligate Amphipod Stygobromus glacialis G1G2 S1S2 A cave obligate Amphipod Stygobromus montanensis G1G2 S1S2 A cave obligate Amphipod Stygobromus obscurus G1G2 S1S2 A cave obligate Amphipod Stygobromus puteanus G1G2 S1S2 A cave obligate Amphipod Stygobromus tritus G1G2 S1S2 A cave obligate Isopod Salmasellus steganothrix G2G3 S1S2

© 2004 Montana Natural Heritage Program 8 POTENTIAL SPECIES OF CONCERN Global State Common Name Scientific Name Rank Rank USFWS USFS BLM Birds American Three-toed Woodpecker Picoides dorsalis G5 S3S4 Baltimore Oriole Icterus galbula G5 S3S4B Black-billed Cuckoo Coccyzus erythropthalmus G5 S3S4B Black-necked Stilt Himantopus mexicanus G5 S3S4B Chimney Swift Chaetura pelagica G5 S3S4B Clark’s Grebe Aechmophorus clarkii G5 S2S4B Common Poorwill Phalaenoptilus nuttallii G5 S3S4B Eastern Screech-Owl Megascops asio G5 S3S4 Great Blue Heron Ardea herodias G5 S3S4 Horned Grebe Podiceps auritus G5 S4 Indigo Bunting Passerina cyanea G5 S2S4B Orchard Oriole Icterus spurius G5 S2S4B Ovenbird Seiurus aurocapilla G5 S3S4B Plumbeous Vireo Vireo plumbeus G5 S3S4B Short-eared Owl Asio flammeus G5 S3S4 Tennessee Warbler Vermivora peregrina G5 S2S4B Western Screech-Owl Megascops kennicottii G5 S3S4 Williamson’s Sapsucker Sphyrapicus thyroideus G5 S3S4B Fish Brassy Minnow Hybognathus hankinsoni G5 SU Brook Stickleback Culaea inconstans G5 SU Burbot Lota lota G5 SU S Creek Chub Semotilus atromaculatus G5 SU Darter Etheostoma exile G5 SU Lake Trout (Native Population) Salvelinus namaycush G5 SU Northern Red-bellied Dace Phoxinus eos G5 SU Plains Minnow Hybognathus placitus G4 SU Pygmy Whitefish Prosopium coulteri G5 SU Shorthead Sculpin Cottus confusus G5 SU Mammals Hayden’s Shrew Sorex haydeni G4 S3S4 Hoary Bat Lasiurus cinereus G5 S3S4 Hoary Marmot Marmota calagata G5 S3S4 Pocket Gopher Thomomys idahoensis G4 S2S4 Silver-haired Bat Lasionycteris noctivagans G5 S3S4 Uinta Ground Squirrel Spermophilus armatus G5 S3S4 Western Spotted Skunk Spilogale gracilis G5 S2S4 Ground Squirrel Spermophilus elegans G5 S3S4 Yuma Myotis Myotis yumanensis G5 S3S4 Invertebrates - Insects Beetles A Tiger Beetle Cicindela cuprascens G5 S3 A Tiger Beetle Cicindela limbata G5 S3 Butterflies Astarte Fritillary Boloria astarte G5 S2S3 Alpine Erebia callias G5 S2S3 Damoetus Checkerspot Chlosyne damoetas G4G5 S3S5 Eyed Brown Satyrodes eurydice G4 S2S3

© 2004 Montana Natural Heritage Program 9 Global State Common Name Scientific Name Rank Rank USFWS USFS BLM Invertebrates - Insects (con’t) Butterflies (con’t) Freija Fritillary Boloria freija G5 S3S5 Giant Sulfur Colias gigantea G5 S3 Indra Swallowtail Papillo indra G5 S2S3 Labrador Sulfur Colias nastes G5 S2S3 Melissa Arctic Oeneis melissa G5 S2S3 Mormon Metalmark Apodemia mormo G5 S3S5 Northern Marble Euchloe creusa G5 S1S3 Red-disked Alpine Erebia discoidalis G5 S3S5 Tawny Crescent Phyciodes batesii G4 S2S3 S White Admiral arthemis G5 S2S3 White-veined Arctic Oeneis bore G5 S2S3 Damselflies Alkali Bluet Enallagma clausum G5 S2S4 Arroyo Bluet Enallagma praevarum G5 S3S5 Emma’s Dancer emma G5 S3S5 Familiar Bluet Enallagma civile G5 S2S4 Paiute Dancer Argia alaberta G4 S2S3 Prairie Bluet Coenagrion angulatum G5 S1S3 Vivid Dancer Argia vidida G5 S3S5 Dragonflies Black-tipped Darner Aeshna tuberculifera G4 S2S4 Blue-eyed Darner Aeshna multicolor G5 S2S4 California Darner Aeshna californica G5 S3S5 Chalk-fronted Skimmer Libellua julia G5 S3S4 Common Whitetail Libellula lydia G5 S3S5 Crimson-winged Whiteface Leucorrhinia glacialis G5 S3 Eight-spotted Skimmer Libellula forensis G5 S3S5 Flame Skimmer Libellula saturata G5 S2S4 cornutus G4 S2S4 Hudsonian Emerald Somatochlora hudsonica G5 S2S4 Lake Darner Aeshna eremita G5 S3S4 Lance-tipped Darner Aeshna constricta G5 S1S3 Mountain Emerald Somatochlora semicircularis G5 S3S5 Ocellated Emerald Somatochlora minor G5 S2S4 Plains Clubtail externus G5 S2S4 Pronghorn Clubtail Gomphus graslinellus G5 S3S5 Red-veined Meadowhawk Sympetrum madidum G4 S2S3 Ringed Emerald Somatochlora albicincta G5 S1S3 River Jewelwing Calopteryz aequabilis G5 S3S4 Rush Darner Aeshna juncea G5 S3S5 Sinuous Snaketail Ophiogomphus occidentis G4 S2S4 Spiny Baskettail Epitheca spinigera G5 S3S5 Twelve-spotted Skimmer Libellula pulchella G5 S3S5 Zigzag Darner Aeshna sitchensis G5 S2S3 Invertebrates - Mollusks Threeridge Valvata Valvata tricarnata G5 S2S3 Western Pearlshell Margaritifera falcata G4 S2S4

© 2004 Montana Natural Heritage Program 10 SPECIES REMOVED FROM CONCERN Global State Common Name Scientific Name Rank Rank Mammals Pygmy Shrew Sorex hoyi G5 S4

SPECIES REMOVED FROM REVIEW

Global State Common Name Scientific Name Rank Rank Birds Cassin’s Vireo Vireo cassinii G5 S4 Wilson’s Phalarope Phalaropus tricolor G5 S4 Mammals Eastern Cottontail Sylvilagus floridanus G5 S4 Reptiles Common Garter Snake Thamnophis sirtalis G5 S4 Damselflies Sweetflag Spreadwing forcipatus G5 SU Variable Dancer Argia Fumipennis violacea G5T5 SU Dragonflies Canada Darner G5 SU Pacific Spiketail Cordulegaster hageni G5 SU Plains Emerald Somatochlora ensigera G4 SU Wandering Glider Pantala flavescens G5 SU Mollusks Columbia Pebblesnail Fluminicola fuscus G3 SU Prairie Sprite Promenetus exacuous megas G5TU SU

© 2004 Montana Natural Heritage Program 11